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Continue to ChatValve Stem Seal - XY1100, Chironex 1000cc, 1100cc - 20A2293 - PBC1714F1 - https://www.giobikes.net/express-parts-catalog/engines-parts-upgrades/valve-stem-seal-xy1100-chironex-1000cc-1100cc-20a2293-pbc1714f1